256 logic elements in a 5x5 mm QFN
The LCMXO2-256HC-4SG32C is a Lattice MachXO2 FPGA with 256 logic elements organised into 32 LABs/CLBs. With 21 user I/O brought out to a 32-UFQFN exposed pad package measuring 5x5 mm, this device targets glue-logic consolidation, small state machines, and interface bridging where board area is the binding constraint.
Fabric size and I/O budget — what fits
256 logic elements is roughly 64 to 80 LUT4-equivalent macrocells after synthesis overhead — enough for a SPI-to-parallel bridge, a few address decoders, or a simple UART. The 21 I/O are all available on the 32-QFN perimeter; the exposed pad is a ground or power slug, not an additional signal. The commercial temperature grade covers 0°C to 85°C junction — suitable for indoor equipment, test gear, and telecom line cards that stay above freezing. For extended industrial or outdoor deployment, the industrial-temperature peer LCMXO2-256HC-4SG32I covers -40°C to 100°C. The -4 speed grade is the mid-range option in the HC family. If the design needs a few extra MHz of Fmax or tighter combinatorial delay, the -6 grade (LCMXO2-256HC-6SG32I) provides a faster speed bin at the same supply voltage and package footprint.
No stock-holding claim; the BOM quantity drives the procurement path.